Experimental Fault-Locating Work on Pipe-Type Cable

This paper covers the results of a research project for locating faults on pipetype cables. Conventional locating methods were studied and were decided to be inadequate to meet many of the fault conditions which may occur on pipe-type cable. Ideas for new methods to supplement existing ones were developed. Tests were made by various means, attempting to approximate the behavior of a fault. Finally, in order to make tests under near actual operating conditions, a fault was built into each of two conductors of a newly constructed, 12-mile 138-kv oil-filled pipe-type cable line. Sufficient information was obtained to assure a quick, accurate location of any type of fault. Some additional developmental work may be required to explore the full potentialities of some of the new fault-locating methods.